工作機械油圧送り機構の周波数応答の解析

抄録

In this paper a frequency response analysis of a hydraulic feed system of machine-tool is described and a method to improve the dynamic characteristics of the system is developed. From the basic equations given in the previous paper, a transfer function of the table motion is introduced. The experimental analysis for the frequency response gives a good agreement with the theoretical analysis and from this result it is made clear that the basic equations are also valid for the frequency response. The frequency response obtained indicates that the dynamic behaviour at the table characteristic frequency region is the most important problem in the hydraulic feed system. Considering this result, a method in which the internal leakage in the cylinder is used to improve the dynamic bahaviour at the table characteristic frequency region is discussed both experimentally and theoretically. The result obtained indicates that this method is effective for the purpose.